Sound and Its Intensity

What happens to the intensity of a sound wave as you move further away from its source?

• It decreases proportionally to the square of the distance.

• It decreases exponentially.

• It remains constant.

• It increases linearly.

How is the intensity of sound measured?

• In hertz

• In lumens

• In decibels

• In watts

What was the approximate decibel level of the Krakatoa eruption?

• 200 dB

• 120 dB

• 180 dB

• 90 dB

What is the upper limit of sound intensity before it becomes a shock wave?

• 180 dB

• 220 dB

• 150 dB

• 194 dB

What measure did NASA take to protect the Space Shuttle from sound damage during launches?

• Used soundproof materials

• Launched in a vacuum

• Used noise-canceling technology

• Dumped water under the launch pad